I understand that the wand of healing is not an obvious first choice for the necromancer. The healing is, in my opinion, the lesser of the two effects the wand grants. Removing conditions on yourself is an amazing ability for any mage. It can remove things such as stun, stuck, slam, daze, corrode, bleed, and burn... all of which can potentially be devastating to your mage. As strange as it sounds, I would even consider running that wand in a build that has deathlock in it.